2018
Altered vector competence in an experimental mosquito-mouse transmission model of Zika infection
Uraki R, Hastings AK, Gloria-Soria A, Powell JR, Fikrig E. Altered vector competence in an experimental mosquito-mouse transmission model of Zika infection. PLOS Neglected Tropical Diseases 2018, 12: e0006350. PMID: 29505571, PMCID: PMC5854422, DOI: 10.1371/journal.pntd.0006350.Peer-Reviewed Original ResearchConceptsZIKV transmissionZika virus infectionNatural transmission routeInfected miceZIKV infectionZika infectionTesting vaccinesVirus infectionIntrathoracic injectionAnimal modelsZIKVInfectionMiceTransmission routesBlood mealVector competenceVector competencyMosquitoesTransmission modelVertebrate hostsMosquito modelPathogenesisVaccine
2005
Effects of Anaplasma phagocytophilum on Host Cell Ferritin mRNA and Protein Levels
Carlyon JA, Ryan D, Archer K, Fikrig E. Effects of Anaplasma phagocytophilum on Host Cell Ferritin mRNA and Protein Levels. Infection And Immunity 2005, 73: 7629-7636. PMID: 16239567, PMCID: PMC1273867, DOI: 10.1128/iai.73.11.7629-7636.2005.Peer-Reviewed Original ResearchConceptsFerritin protein levelsProtein levelsHL-60 cellsA. phagocytophilumAnaplasma phagocytophilumSerum-opsonized zymosanHuman granulocytic anaplasmosisA. phagocytophilum infectionInfected HL-60 cellsTime-dependent mannerObligate intracellular bacteriumFerritin levelsInfected miceA. phagocytophilum-infected miceMajor intracellular iron storage proteinFerritin heavy chainHuman promyelocytic HL-60 cellsNADPH oxidase assemblyNeutrophilsPromyelocytic HL-60 cellsMRNA expressionPhagocytophilum infectionIntracellular pathogensGranulocytic anaplasmosisIntracellular bacterium
2002
Cyclooxygenase 2 activity modulates the severity of murine Lyme arthritis
Anguita J, Samanta S, Ananthanarayanan SK, Revilla B, Geba GP, Barthold SW, Fikrig E. Cyclooxygenase 2 activity modulates the severity of murine Lyme arthritis. Pathogens And Disease 2002, 34: 187-191. PMID: 12423770, PMCID: PMC4307933, DOI: 10.1111/j.1574-695x.2002.tb00623.x.Peer-Reviewed Original ResearchConceptsJoint inflammationCOX-2B. burgdorferi-specific antibodyBurgdorferi-specific antibodiesOnset of arthritisDegree of inflammationNoninfectious inflammatory diseasesCyclooxygenase-2 activityCOX-2 activityB. burgdorferiCOX-2 gene expressionMurine Lyme arthritisSpecific inhibitionLyme arthritisCytokine responsesInfectious arthritisRheumatoid arthritisInfected miceInflammatory diseasesInducible isoformMurine jointsArthritisInflammationMRNA expressionLyme diseaseSuperoxide Anion Production during Anaplasma phagocytophila Infection
Wang T, Malawista SE, Pal U, Grey M, Meek J, Akkoyunlu M, Thomas V, Fikrig E. Superoxide Anion Production during Anaplasma phagocytophila Infection. The Journal Of Infectious Diseases 2002, 186: 274-280. PMID: 12134266, DOI: 10.1086/341451.Peer-Reviewed Original ResearchConceptsChronic granulomatous diseaseRespiratory burstA. phagocytophilaRespiratory burst inhibitionNitroblue tetrazoliumPopulation of neutrophilsSuperoxide anion productionInfected miceGranulomatous diseaseMouse modelUse of assaysPolymorphonuclear leukocytesUninfected animalsAnaplasma phagocytophilaAnion productionNeutrophilsInfectionHL-60 cellsIndividual cell basisAssaysCell basisCellsPatientsLeukocytesDisease
2001
Coinfection with Borrelia burgdorferi and the Agent of Human Granulocytic Ehrlichiosis Alters Murine Immune Responses, Pathogen Burden, and Severity of Lyme Arthritis
Thomas V, Anguita J, Barthold S, Fikrig E. Coinfection with Borrelia burgdorferi and the Agent of Human Granulocytic Ehrlichiosis Alters Murine Immune Responses, Pathogen Burden, and Severity of Lyme Arthritis. Infection And Immunity 2001, 69: 3359-3371. PMID: 11292759, PMCID: PMC98295, DOI: 10.1128/iai.69.5.3359-3371.2001.Peer-Reviewed Original ResearchConceptsHuman granulocytic ehrlichiosisLyme arthritisDual infectionBacterial burdenImmune responseTumor necrosis factor-alpha levelsB. burgdorferiElevated IL-6 levelsNecrosis factor-alpha levelsGranulocytic ehrlichiosisIL-6 levelsAgent of HGEMurine immune responseBorrelia burgdorferiTick-borne illnessMurine Lyme arthritisSevere Lyme arthritisCoinfection of miceIFN-gamma receptor expressionInfected miceInterleukin-12Receptor expressionGamma interferonArthritisPathogen burdenOspA Immunization Decreases Transmission of Borrelia burgdorferi Spirochetes from Infected Peromyscus leucopus Mice to Larval Ixodes scapularis Ticks
Tsao J, Barbour A, Luke C, Fikrig E, Fish D. OspA Immunization Decreases Transmission of Borrelia burgdorferi Spirochetes from Infected Peromyscus leucopus Mice to Larval Ixodes scapularis Ticks. Vector-Borne And Zoonotic Diseases 2001, 1: 65-74. PMID: 12653137, DOI: 10.1089/153036601750137705.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAnimals, WildAntibodies, BacterialAntigens, SurfaceArachnid VectorsBacterial Outer Membrane ProteinsBacterial VaccinesBorrelia burgdorferiDisease ReservoirsDose-Response Relationship, ImmunologicEnzyme-Linked Immunosorbent AssayFluorescent Antibody Technique, DirectHost-Parasite InteractionsIxodesLarvaLipoproteinsLyme DiseasePeromyscusConceptsControl miceUninfected larval ticksInfection prevalenceLarval Ixodes scapularis ticksB. burgdorferiNumber of spirochetesEnzyme-linked immunosorbentBorrelia burgdorferi spirochetesLevel of immunizationReservoir hostsConcentration of antibodyBorrelia burgdorferi transmissionIxodes scapularis ticksSecond vaccinationImmunized miceInfected miceLarval ticksPrior infectionVaccination programSubsequent riskDecrease transmissionOspA vaccinationDirect immunofluorescenceImmune responseXenodiagnostic ticks
1998
Immune Evasion by Tickborne and Host-Adapted Borrelia burgdorferi
de Silva A, Fikrig E, Hodzic E, Kantor F, Telford S, Barthold S. Immune Evasion by Tickborne and Host-Adapted Borrelia burgdorferi. The Journal Of Infectious Diseases 1998, 177: 395-400. PMID: 9466527, DOI: 10.1086/514200.Peer-Reviewed Original Research
1997
Borrelia burgdorferi strain-specific Osp C-mediated immunity in mice
Bockenstedt LK, Hodzic E, Feng S, Bourrel KW, de Silva A, Montgomery RR, Fikrig E, Radolf JD, Barthold SW. Borrelia burgdorferi strain-specific Osp C-mediated immunity in mice. Infection And Immunity 1997, 65: 4661-4667. PMID: 9353047, PMCID: PMC175668, DOI: 10.1128/iai.65.11.4661-4667.1997.Peer-Reviewed Original ResearchConceptsChallenge infectionC antiserumImmunization studiesStrain-specific immunityAntibody-mediated immunityPassive immunization studiesImmune mouse serumSurface protein AOuter surface protein ADisease regressionInfected miceBorreliacidal activityC antibodySpirochete Borrelia burgdorferiAnimal modelsImmune serumMouse serumInfectionLyme borreliosisMiceHyperimmune serumOsp AImmunofluorescence studiesBorrelia burgdorferiSurface expressionBorrelia burgdorferi P35 and P37 Proteins, Expressed In Vivo, Elicit Protective Immunity
Fikrig E, Barthold S, Sun W, Feng W, Telford S, Flavell R. Borrelia burgdorferi P35 and P37 Proteins, Expressed In Vivo, Elicit Protective Immunity. Immunity 1997, 6: 531-539. PMID: 9175831, DOI: 10.1016/s1074-7613(00)80341-6.Peer-Reviewed Original ResearchConceptsElicit protective immunityB. burgdorferiIgG titersProtective immunityInfected miceImmune responseHost immunityLyme borreliosisRT-PCR analysisMiceVivo-expressed antigensBorrelia burgdorferi genesImmunityP35BurgdorferiP37 proteinVivoNorthern blotAntiserumP37PatientsAntigenELISATitersBorreliosisTemporal pattern of Borrelia burgdorferi p21 expression in ticks and the mammalian host.
Das S, Barthold SW, Giles SS, Montgomery RR, Telford SR, Fikrig E. Temporal pattern of Borrelia burgdorferi p21 expression in ticks and the mammalian host. Journal Of Clinical Investigation 1997, 99: 987-995. PMID: 9062357, PMCID: PMC507907, DOI: 10.1172/jci119264.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsAntibodies, BacterialAntigens, BacterialAntigens, SurfaceArthritis, InfectiousBacterial Outer Membrane ProteinsBacterial ProteinsBacterial VaccinesBorrelia burgdorferi GroupElectrophoresis, Gel, Pulsed-FieldEnzyme-Linked Immunosorbent AssayFemaleFlagellinFluorescent Antibody Technique, IndirectGene Expression Regulation, BacterialHumansImmunizationImmunization, PassiveImmunoblottingIxodesLipoproteinsLyme DiseaseMiceMice, Inbred C3HPlasmidsPolymerase Chain ReactionRecombinant ProteinsRNA, MessengerTime FactorsConceptsInfected miceHumoral responseLate-stage Lyme diseaseMarkers of infectionCourse of diseaseMurine Lyme borreliosisB. burgdorferiB. burgdorferi infectionHuman humoral responseIxodes dammini ticksBurgdorferi-infected miceLyme arthritisActive immunizationMammalian hostsPassive transferBurgdorferi infectionC3H miceMurine infectionDay 14P21 antibodyP21 expressionLyme borreliosisLyme diseaseMiceInfection